| CPC A61F 2/2418 (2013.01) [A61F 2/2433 (2013.01); A61F 2/2466 (2013.01); A61F 2/9517 (2020.05); A61F 2210/00 (2013.01)] | 20 Claims |

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1. A prosthesis comprising:
a stent frame having an inner surface and an outer surface;
a valve structure positioned within the stent frame; and
a helical track formed by one or more guides extending inwardly from the inner surface of the stent frame, wherein at least one of the one or more guides defines an enclosed opening.
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